Why even have this up? I have ALMOST done it by accident. Some bathrooms here are made to look like others(At airports, for example, some bathrooms have two entrances, and some bathroom entrances look identical but one side is for males, and the other is for females.), and you have to be careful. Luckily, I never made the mistake. STILL, sometimes I look through the crack in the stall door to make sure the urinals are there, just in case.
BTW Women tend, on average, to use the restroom 33% more out of need, and go more often for support. Sorry ladies, it is true. ALSO, urinals take less time and provide for more men to be supported.
Because of these THREE facts, womens lines at bathrooms at large events tend to be MUCH longer. I have actually heard some women theorize conspiracies. It is simply social and biological differences.
Anyway, California and some other states now MANDATE that women should be allowed to use the mens rest rooms if needed!! !! !
Steve